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iq80321_pci.c revision 1.6 
      1 /*	$NetBSD: iq80321_pci.c,v 1.6 2011/04/04 20:37:48 dyoung Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed for the NetBSD Project by
     20  *	Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 /*
     39  * IQ80321 PCI interrupt support.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: iq80321_pci.c,v 1.6 2011/04/04 20:37:48 dyoung Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/device.h>
     48 
     49 #include <machine/autoconf.h>
     50 #include <machine/bus.h>
     51 
     52 #include <evbarm/iq80321/iq80321reg.h>
     53 #include <evbarm/iq80321/iq80321var.h>
     54 
     55 #include <arm/xscale/i80321reg.h>
     56 #include <arm/xscale/i80321var.h>
     57 
     58 #include <dev/pci/pcidevs.h>
     59 #include <dev/pci/ppbreg.h>
     60 
     61 int	iq80321_pci_intr_map(const struct pci_attach_args *,
     62 	    pci_intr_handle_t *);
     63 const char *iq80321_pci_intr_string(void *, pci_intr_handle_t);
     64 const struct evcnt *iq80321_pci_intr_evcnt(void *, pci_intr_handle_t);
     65 void	*iq80321_pci_intr_establish(void *, pci_intr_handle_t,
     66 	    int, int (*func)(void *), void *);
     67 void	iq80321_pci_intr_disestablish(void *, void *);
     68 
     69 void
     70 iq80321_pci_init(pci_chipset_tag_t pc, void *cookie)
     71 {
     72 
     73 	pc->pc_intr_v = cookie;		/* the i80321 softc */
     74 	pc->pc_intr_map = iq80321_pci_intr_map;
     75 	pc->pc_intr_string = iq80321_pci_intr_string;
     76 	pc->pc_intr_evcnt = iq80321_pci_intr_evcnt;
     77 	pc->pc_intr_establish = iq80321_pci_intr_establish;
     78 	pc->pc_intr_disestablish = iq80321_pci_intr_disestablish;
     79 }
     80 
     81 int
     82 iq80321_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
     83 {
     84 	struct i80321_softc *sc = pa->pa_pc->pc_intr_v;
     85 	int b, d, f;
     86 	uint32_t busno;
     87 
     88 	/*
     89 	 * The IQ80321's interrupts are routed like so:
     90 	 *
     91 	 *	XINT0	i82544 Gig-E
     92 	 *
     93 	 *	XINT1	UART
     94 	 *
     95 	 *	XINT2	INTA# from S-PCI-X slot
     96 	 *
     97 	 *	XINT3	INTB# from S-PCI-X slot
     98 	 */
     99 
    100 	busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
    101 	busno = PCIXSR_BUSNO(busno);
    102 	if (busno == 0xff)
    103 		busno = 0;
    104 
    105 	pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, &b, &d, &f);
    106 
    107 	/* No mappings for devices not on our bus. */
    108 	if (b != busno)
    109 		goto no_mapping;
    110 
    111 	switch (d) {
    112 	case 4:			/* i82544 Gig-E */
    113 		if (pa->pa_intrpin == 1) {
    114 			*ihp = ICU_INT_XINT(0);
    115 			return (0);
    116 		}
    117 		goto no_mapping;
    118 
    119 	case 6:			/* S-PCI-X slot */
    120 		if (pa->pa_intrpin == 1) {
    121 			*ihp = ICU_INT_XINT(2);
    122 			return (0);
    123 		}
    124 		if (pa->pa_intrpin == 2) {
    125 			*ihp = ICU_INT_XINT(3);
    126 			return (0);
    127 		}
    128 		goto no_mapping;
    129 
    130 	default:
    131  no_mapping:
    132 		printf("iq80321_pci_intr_map: no mapping for %d/%d/%d\n",
    133 		    pa->pa_bus, pa->pa_device, pa->pa_function);
    134 		return (1);
    135 	}
    136 
    137 	return (0);
    138 }
    139 
    140 const char *
    141 iq80321_pci_intr_string(void *v, pci_intr_handle_t ih)
    142 {
    143 
    144 	return (i80321_irqnames[ih]);
    145 }
    146 
    147 const struct evcnt *
    148 iq80321_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
    149 {
    150 
    151 	/* XXX For now. */
    152 	return (NULL);
    153 }
    154 
    155 void *
    156 iq80321_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
    157     int (*func)(void *), void *arg)
    158 {
    159 
    160 	return (i80321_intr_establish(ih, ipl, func, arg));
    161 }
    162 
    163 void
    164 iq80321_pci_intr_disestablish(void *v, void *cookie)
    165 {
    166 
    167 	i80321_intr_disestablish(cookie);
    168 }
    169